Halogenation processes in advantageous solvents and novel bistrifluoromethyl-polyfluoroalkoxybenzenes

ABSTRACT

In halogenation processes, the use of carbon tetrachloride as a solvent can be avoided if one or more compounds of the formula (I) &lt;IMAGE&gt;  in which   R stands for fluorine, chlorine, CF3, CF2H, CF2Cl, CHFCF3, CF2CF3 or CFClCF3,   Hal stands for fluorine or chlorine,   a stands for zero, 1, 2 or 3,   b stands for zero, 1 or 2 and c stands for zero or, if Hal = fluorine, also for 1, 2 or 3 and if Hal = chlorine, also for 1, where a and b do not simultaneously stand for zero and the sum a + b + c is at most 6, are employed. Novel, chlorine-free bistrifluoromethylpolyfluoroalkoxybenzenes correspond to the formula (II) &lt;IMAGE&gt;  in which R&#39; represents fluorine, CF3, CH2H, CHFCF3 or CF2CF3.o



